<?php
// This file is part of BOINC.
// http://boinc.berkeley.edu
// Copyright (C) 2008 University of California
//
// BOINC is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
//
// BOINC is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with BOINC. If not, see <http://www.gnu.org/licenses/>. 
//
// This file was modified by contributors of "BOINC Web Tweak" project.

require_once("../inc/cache.inc");
require_once("../inc/util.inc");
require_once("../inc/user.inc");
require_once("../inc/host.inc");
require_once("../inc/boinc_db.inc");
require_once("../inc/translation.inc");

$config = get_config();
$hosts_per_page = parse_config($config, "<hosts_per_page>");
if (!$hosts_per_page)
	$hosts_per_page = 20;

define ('ITEM_LIMIT', 10000);

function get_top_hosts($offset, $sort_by) {
	global $hosts_per_page;
	$db = BoincDb::get(true);
	if ($sort_by == "total_credit")
		$sort_order = "total_credit desc";
	else
		$sort_order = "expavg_credit desc";
	return BoincHost::enum(null, "order by $sort_order limit $offset, $hosts_per_page");
}

function hosts_to_store($participants)
	return serialize($participants);

function store_to_hosts($data)
	return unserialize($data);

$sort_by = get_str("sort_by", true);
switch ($sort_by) {
case "total_credit":
case "expavg_credit":
	break;
default:
	$sort_by = "expavg_credit";
}

$offset = get_int("offset", true);
if (!$offset || $offset % $hosts_per_page)
	$offset = 0;

if ($offset >= ITEM_LIMIT)
	error_page("Limit exceeded - Sorry, first ".ITEM_LIMIT." items only");

$cache_args = "sort_by=$sort_by&amp;offset=$offset";
$cacheddata = get_cached_data(TOP_PAGES_TTL, $cache_args);
if ($cacheddata){
	$data = store_to_hosts($cacheddata);
} else {
	$data = get_top_hosts($offset,$sort_by);
	set_cache_data(hosts_to_store($data), $cache_args);
};

// Now display what we've got (either gotten from cache or from DB)
//
page_head(tra("Top hosts"));
top_host_table_start($sort_by);
$i = 1 + $offset;
$n = sizeof($data);
foreach($data as $host) {
	show_host_row($host, $i, false, true);
	$i++;
}
echo "</table>\n<p>";

if ($offset > 0) {
	$new_offset = $offset - $hosts_per_page;
	echo '<a href="top_hosts.php?sort_by=$sort_by&amp;offset=$new_offset">Previous '.$hosts_per_page.'</a>';
	if ($n == $hosts_per_page)
		echo " | ";
}
if ($n == $hosts_per_page){ //If we aren't on the last page
	$new_offset = $offset + $hosts_per_page;
	echo '<a href="top_hosts.php?sort_by=$sort_by&amp;offset=$new_offset">Next '.$hosts_per_page.'</a>';
}

page_tail();


?>
